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**1. Introduction** 

include:

**3. Overview** 

1. Reception tank 2. Digester or fermenter

3. Gas holder 4. Overflow tank

the tank, height …etc.

**3.1 Components of the biogas unit**  The components of a biogas unit are:

**17** 

M. Samer

*Egypt* 

**Biogas Plant Constructions** 

The chapter concerns with the constructions of the commercial biogas plants as well as the small and household units. Furthermore, the chapter aims at providing a clear description of the structures and constructions of the anaerobic digesters and the used building materials. Ultimately, the chapter answers an important question: how to build a commercial biogas

The chapter describes the construction steps and operation of biogas plant, which

a. Planning the biogas plant layout and designing the digesters, where the rules of thumb for planning the layout of a commercial biogas plant are elucidated and a methodology for specifying the dimensions of both digester(s) and residue storage tank(s) is illustrated, and they are: internal and external diameters of the tanks, wall thickness of

b. Undertaking the project, i.e. carrying out the excavation (digging) works, preparation of the bottom plate of the digester, integrating the heating tubes, building the fermenter,

c. Running the biogas plant including the mechanization of the biogas plant such as:

d. System control, i.e. how the individual facility components are monitored by computer

plant and a household unit, and what are the construction steps?

installing the insulation, and technology installation.

solids feeder, gas processing unit, mixing technology …etc.

technology even from afar as well as on-site using a computer system.

**2. Chapter description and contents overview** 

*Cairo University, Faculty of Agriculture, Department of Agricultural Engineering,* 

Yu, H. Q., Fang, H. H. P., & Gu, G. W. (2002). Comparative Performance of Mesophilic and Thermophilic Acidogenic Upflow Reactors. *Process Biochemistry*, Vol. 38, No. 3, pp. 447-454, ISSN 1359-5113
